Owners of Chromecast 2nd Gen and Audio worldwide are getting an "untrusted device" error. Google is advising against resetting the device while it is working on a fix.
The issues began on March 9, 2025, according to reports on various forums including the Google Nest forum and Reddit. The error affects the older Chromecast devices worldwide.
A message appears on the screen preventing the user from playing video and audio on the Chromecast. The message reads, "Untrusted device: couldn’t be verified. This could be caused by outdated device firmware," according to Android Authority.
Likely caused by expired certificate
According to owners who have tried to resolve the issue, the error is caused by an expired security certificate in the devices. The security certificate had a validity of 10 years and expired on March 9, 2025 – about 10 years after the devices were introduce
It means Chromecast devices can no longer connect via a secure connection to Google’s servers, causing the devices to malfunction.
The issue highlights the fact that Chromecast devices only work as long as Google continues to update them and keep its Chromecast servers online. It is unknown whether newer Chromecast devices have a similar security certificate with a 10-year validity.
The error affects Chromecast 2 (pictured) and Chromecast Audio
Google is working on a fix
In a direct response to owners, Google acknowledges that the issue lies on their end and that a fix is being worked on.
If you are affected by the problem, you should wait for an official solution. Google advises against resetting the device.
- "We're aware of an emerging issue impacting Chromecast 2nd gen and Chromecast Audio devices and are working on a fix. Do not factory reset your device - we will keep you all updated when the fix rolls out. If you have already factory reset your device, we will provide instructions to set your device back up as soon as possible. Thank you for your patience," writes Google.
The company did not provide an estimate for when the fix will be ready.
- Source: Android Authority, Google
